Papers

• Sima, V., D.M. Sima, and S. Van Huffel (2004). "High-performance numerical algorithms and software for subspace-based linear multivariable system identification.". J. Comput. Appl. Math., Vol. 170, 2, 371-397.
• Sima, V. (2004). "Computational experience with subspace identification tools". CD-ROM Proceedings of The 12th Mediterranean Conference on Control and Automation MED'04, June 6-9 2004, Kusadasi, Turkey. Special Session on "Computational Methods for CACSD-1", Paper 3, 6 pages.
• Van Huffel, S., V. Sima, A. Varga, S. Hammarling, and F. Delebecque (2004). "High performance numerical software for control". IEEE Control Systems Magazine, Vol. 24, 1, 60-76.
• Mitiche-Adamou, A.B.H., L. Mitiche, and V. Sima (2004). "Descriptor systems approximation". International Journal of General Systems (Taylor & Francis Ltd.), Vol. 33, 1, 99-110.
• Sima, V. (2003). "SLICOT-based advanced automatic control computations". In M. Voicu (Ed.), Advances in Automatic Control, Kluwer Academic Publishers, Boston/Dordrecht/London, 337-350. ISBN 1-4020-7607-X.
• Sima, V. (2003). "Fast numerical algorithms for Wiener systems identification". In V. Barbu, I. Lasiecka, D. Tiba, and C. Varsan (Eds.), Analysis and Optimization of Differential Systems, Kluwer Academic Publishers, Boston/Dordrecht/London, 375-386. ISBN 1-4020-7439-5.
• Sima, V. (2003). "Performance investigation of SLICOT Wiener systems identification toolbox". CD-ROM Proceedings of The 13th IFAC Symposium on System Identification, SYSID 2003, August 27-29, 2003, Rotterdam, The Netherlands. Sept. 1-4, 2003, 1345-1350.
• Sima, V., and P. Benner (2003). "Solving linear matrix equations with SLICOT". CD-ROM Proceedings of the 7th European Control Conference ECC'03, Sept. 1-4, 2003, University of Cambridge, UK. 6 pages.
• Benner, P., and V. Sima (2003). "Solving algebraic Riccati equations with SLICOT". CD-ROM Proceedings of The 11th Mediterranean Conference on Control and Automation MED'03, June 18-20 2003, Rhodes, Greece. Invited Session IV01 "Computational Toolboxes in Control Design", Paper IV01-01, 6 pages.
• Sima, V. (2003). "Identification of a steel subframe flexible structure using SLICOT system identification toolbox". CD-ROM Proceedings of The 11th Mediterranean Conference on Control and Automation MED'03, June 18-20 2003, Rhodes, Greece. Invited Session IV01 "Computational Toolboxes in Control Design", Paper IV01-07, 6 pages.
• Van Huffel, S., and V. Sima (2002). "SLICOT and control systems numerical software packages". CD-ROM Proceedings of the 2002 IEEE International Conference on Control Applications and IEEE International Symposium on Computer Aided Control System Design, CCA/CACSD 2002, September 18-20, 2002, Glasgow, Scotland, 39-44.
• Sima, V., D.M. Sima, and S. Van Huffel (2002). "SLICOT system identification software and applications". CD-ROM Proceedings of the 2002 IEEE International Conference on Control Applications and IEEE International Symposium on Computer Aided Control System Design, CCA/CACSD 2002, September 18-20, 2002, Glasgow, Scotland, 45-50.
• Mastronardi, N., D. Kressner, V. Sima, P. Van Dooren, and S. Van Huffel (2001). "A fast algorithm for subspace state-space system identification via exploitation of the displacement structure". J. Comput. Appl. Math., Vol. 132, 1, 71-81.
• Sima, V., and S. Van Huffel (2001). "Performance investigation of SLICOT system identification toolbox". Proceedings of the European Control Conference, ECC 2001, 4-7 September, 2001, Seminario de Vilar, Porto, Portugal, FR-IS02-7, 3586-3591.
• Sima, V. (2001). "Comparison of subspace-based system identification software tools". Proceedings of the Third NICONET Workshop on "Numerical Software in Control Engineering", January 19, 2001, Louvain-la-Neuve, Belgium, 97-104.
• Sima, V., P. Petkov, and S. Van Huffel (2000). "Efficient and reliable algorithms for condition estimation of Lyapunov and Riccati equations". Mathematical Theory of Networks and Systems, CD-Rom Proceedings of the MTNS-2000 Symposium held in Perpignan, France, June 19-23, 2000, 10 pages.
• Sima, V., and S. Van Huffel (2000). "SLICOT subspace identification toolbox". Proceedings CD of the UKACC International Conference on Control 2000, 4-7 September, 2000, University of Cambridge, United Kingdom, 6 pages.
• Sima, V., and S. Van Huffel (2000). "Efficient numerical algorithms and software for subspace-based system identification". In Dr. L.K. Mestha (Ed.), Proceedings of the 2000 IEEE International Conference on Control Applications and IEEE International Symposium on Computer-Aided Control Systems Design, September 25-27, 2000, Anchorage, Alaska, U.S.A., Omnipress, 1-6.
• Benner, P., V. Mehrmann, V. Sima, S. VanHuffel, and A. Varga (1999). "SLICOT --- A subroutine library in systems and control theory". Birkhauser Book series on "Applied and Computational Control, Signals, and Circuits" (B.N. Datta, Ed.), Vol. 1, ch. 10, 499-539.
• Favoreel, W., S. Van Huffel, B. De Moor, V. Sima, and M. Verhaegen (1999). "Comparative study between three subspace identification algorithms". In Proceedings of the 5th European Control Conference ECC 99, 31 August - 3 September 1999, Karlsruhe, Germany, Session BA-3, Identification III, 1 September 1999, Paper F298, 6 pages.
• Sima, V., and S. Van Huffel (1999). "High-performance algorithms and software for systems and control computations". In O. Gonzales (Ed.), Proceedings of the 1999 IEEE International Conference on Control Applications and IEEE International Symposium on Computer Aided Control System Design, August 22-27, 1999, Kohala Coast-Island of Hawai'i, Hawai'i, USA, Omnipress, 85-90.
• Sima, V (1999). "Cholesky or QR factorization for data compression in subspace-based identification?". Proceedings of the Second NICONET Workshop on "Numerical Control Software: SLICOT, a Useful Tool in Industry", December 3, 1999, INRIA Rocquencourt, France, 75-80.
• Sima, V. (1999). "Accurate computation of eigevalues and real Schur form of 2x2 real matrices". Proceedings of the Second NICONET Workshop on "Numerical Control Software: SLICOT, a Useful Tool in Industry", December 3, 1999, INRIA Rocquencourt, France, 81-86.
• Sima, V., P. Benner, S. Van Huffel, and A. Varga (1998). "Improving the efficiency and accuracy of the Matlab Control Toolbox using SLICOT-based gateways". In A. Beghi, L. Finesso, and G. Picci (Eds.), Mathematical Theory of Networks and Systems, Proceedings of the MTNS-98 Symposium held in Padova, Italy, July, 1998, Il Poligrafo, 673-676. ISBN 88-7115-117-8.
• Sima, V., A. Varga, and M. Verhaegen (1996). "LAPACK-based software for subspace identification". WGS Newsletter, No. 10, 9-14.
• Sima, V. (1996). "Algorithms and LAPACK-based software for subspace identification". Proceedings of The 1996 IEEE International Symposium on Computer-Aided Control System Design, September 15-18, 1996, Dearborn, MI, U.S.A., 182-187.
• Sima, V. (1996). "Subspace-based algorithms for multivariable system identification". Studies in Informatics and Control, Vol. 5, 4, 335-344.
• Sima, V. (1995). "Computational experience with structure preserving algorithms for solving algebraic Riccati equations". In A. Isidori, S. Bittanti, E. Mosca, A. De Luca, M. D. Di Benedetto, G. Oriolo (Eds.), Proceedings of the third European Control Conference ECC 95, September 5-8, 1995, Rome, Italy, Vol. 4, Part one, 3212-3217.
• Sima, V. (1995). "Computational experience with nonlinearly constrained optimization algorithms using feasible or unfeasible iterates". In A. Sydow, Th. Lux, and R.-P. Schafer (Eds.), Proceedings of the IMACS Symposium on Systems Analysis and Simulation, Berlin, 26-30 June, 1995, Systems Analysis Modelling Simulation, Gordon & Breach Science Publishers, Vol. 18-19, 467-470.
• Sima, V. (1995). "Solving algebraic Riccati equations using Gaussian symplectic transformations: Algorithmic templates and computational experience". In F.-Gh. Filip, and M. Guran (Eds.), 25 Years of Informatics: Contributions to Research & Development, Research Institute for Informatics, Sept. 1995, Bucharest, Paper 13, 14 pages.
• Sima, V. (1994). "Computational experience with an algorithm for nonlinearly constrained optimization calculations". In A. Sydow (Ed.), Systems Analysis Modelling Simulation, Gordon & Breach Science Publishers S.A., Vol. 14, 93-111.
• Sima, V. (1993). "Efficient and stable computation of quasi-Newton updates". Studies in Informatics and Control, 2, 41-50.
• Sima, V. (1993). "Computational experience in solving algebraic Riccati equations using Gaussian symplectic transformations". Preprints of The 12-th IFAC World Congress, July 18-23, 1993, Sydney, Australia. The Institution of Engineers, Australia, Vol. 6, 433-436. Also, in G.C. Goodwin and R.J. Evans (Eds.), Proceedings of the 12th Trienninal World Congress of the International Federation of Automatic Control (IFAC), Sydney, Australia, 18-23 July 1993, Vol. 2, Elsevier Science Ltd., Oxford, 1994, 6 pages.
• Sima, V. (1992). "An efficient algorithm for solving nonlinearly constrained optimization problems". In A. Sydow (Ed.), Computational Systems Analysis 1992 (Proc. of the 4th International Symposium on Systems Analysis and Simulation, August 25-28, 1992, Berlin, Germany), Elsevier Science Publishers B.V., Amsterdam, 73-78.
• Sima, V. (1992). "Algorithm PODQP: Solving positive definite quadratic programming problems". Studies in Informatics and Control, 1, 63-71.
• Sima, V. (1992). "Algorithm VMCWDM: Solving nonlinearly constrained optimization problems". Studies in Informatics and Control, 1, 151-165.
• Sima, V. (1992). "Algorithm GRICSR: Solving continuous-time algebraic Riccati equations using Gaussian symplectic transformations". Studies in Informatics and Control, 1, 237-254.
• Sima, V. (1992). "Algorithm SIGNM: Solving continuous-time algebraic Riccati equations using matrix sign function method". Studies in Informatics and Control, 1, 335-355.
• Sima, V. (1991). "On Hamiltonian-symplectic algorithms for solving algebraic Riccati equations". In I.D. Landau et al. (Eds.), Proc. of the First European Control Conference ECC'91, Grenoble, France, July 2-5, 1991, Edition Hermes, Paris, Vol. 3, 2202-2207.
• Sima, V. (1991). "On global convergence of stochastic adaptive prediction and control algorithms". Preprints of the 9-th IFAC/IFORS Symposium on Identification and System Parameter Estimation, Budapest, July 8-12, 1991, 6 pages.
• Sima, V. (1990). "Comparison of some algorithms to solve the algebraic Riccati equations". Studies and Researches in Computers and Informatics, 2, 77-96.
• Sima, V. (1990). "A software package for constrained optimization with applications to control problems". Studies and Researches in Computers and Informatics, 3, 117-127.
• Sima, V. (1990). "Convergence of stochastic adaptive prediction and control algorithms". Studies and Researches in Computers and Informatics, 4, 47-58.
• Sima, V. (1989). "On convergence of weighted least squares algorithms". Studies and Researches in Computers and Informatics, 2, 103-113.
• Sima, V. (1988). "OPTPACK - An interactive optimization software package for personal computers". In A. Sydow, S.G. Tzafestas, R. Vichnevetsky (Eds.), Systems Analysis and Simulation 1988, Mathematical Research, Band 46, Akademie-Verlag, Berlin, Vol. 1, 286-289.
• Sima, V. (1985). "Convergence of adaptive prediction and control algorithms". Advances in Modelling and Simulation, AMSE Press, 4, 29-40.
• Sima, V. (1985). "Convergence of multirecursive least squares adaptive algorithms". In A. Sydow, M. Thoma, R. Vichnevetsky (Eds.), Systems Analysis and Simulation, Akademie-Verlag, Berlin, Vol. 1, 414-417.
• Sima, V. (1985). "Factorization techniques in discrete time adaptive control". In J. Gertler, L. Keviczky (Eds.), A Bridge between Control Science and Technology, Pergamon Press, Oxford, Vol. 2, 6 pages.
• Varga, A., and V. Sima (1985). "BIMAS - A basic mathematical package for computer-aided systems analysis and design". In J. Gertler, L. Keviczky (Eds.), A Bridge between Control Science and Technology, Pergamon Press, Oxford, Vol. 1, 6 pages.
• Sima, V. (1981). "An efficient Schur method to solve the stabilizing problem". IEEE Trans. Automat. Control, AC-26, 724-725.
• Sima, V. (1981). "Algorithms for discrete model reference adaptive control systems". Rev. Roum. Sci. Techn.-Electrotechn. et Energ., 26, 595-607.
• Varga, A., and V. Sima (1981). "Numerically stable algorithm for transfer-function matrix evaluation". Int. J. Control, 33, 1123-1133.
• Sima, V. (1980). "Comparison of some algorithms for solving the Lyapunov-type equations". Rev. Roum. Sci. Techn.-Electrotechn. et Energ., 25, 235-246.
• Sima, V. (1980). "On the real Schur form in linear control system design". Rev. Roum. Sci. Techn.-Electrotechn. et Energ., 25, 625-632.

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